numpy.alen() in Python (original) (raw)

Last Updated : 28 Dec, 2018

**numpy.alen() **function is used to return the length of the first dimension of the input array.

Syntax : numpy.alen(arr)Parameters : arr : [array_like] Input array.Return : [int]Length of the first dimension of arr.

Code #1 :

Python3 `

Python program explaining

alen() function

import numpy as geek

input array(2 * 3)

in_arr = geek.array([[ 2, 0, 7], [ 0, 5, 9]]) print ("Input array : ", in_arr)

out_dim = geek.alen(in_arr) print ("Length of the first dimension of arr: ", out_dim)

`

Output:

Input array : [[2, 0, 7], [0, 5, 9]] Length of the first dimension of arr: 2

Code #2 :

Python3 `

Python program explaining

alen() function

import numpy as geek

input array(1 * 3*3)

in_arr = geek.arange(9).reshape(1, 3, 3) print ("Input array : \n", in_arr)

out_dim = geek.alen(in_arr) print ("Length of the first dimension of arr: ", out_dim)

`

Output:

Input array : [[[0 1 2] [3 4 5] [6 7 8]]] Length of the first dimension of arr: 1